17.0 Comments in the Epistles concerning water baptism

Without exception, each of the epistles were written to people
who were already "saved." The epistles were
written to groups of saved people from Rome, from
Corinth, from Galatia, and so–on. In addition, some of
the epistles were written to individual saved people,
such as Timothy, Titus, or Philemon.

When you were young, your mother never told you how to
become alive...she only told you how to live,
and how to remain alive. She told you such things
as "Eat your vegtables," "Tie your shoes,"
"Brush your teeth," "Put your coat on," ...and
things like that. She never told you how to become alive,
because you were already alive.

Likewise in the EPISTLES, the apostles didn't tell anyone how
to become saved; they told them how to live, and
how to remain saved. Why tell someone that they
need to be born again, when they have already been born again?

Each of the cities for which the various epistles were named
had a local congregation to tell the unbelievers how to become
saved. This was done face–to–face, or
speaker–to–group, just as recorded in the book of
Acts. In the epistles themselves, however, the apostles
wrote to the various people and congregations in order to
instruct, and to encourage them to remain in the
faith.

It really is that simple.

However, on occasion, when it is relevant to whatever
particular topic that the apostle is writing about, that
particular church's members having become saved (in the
past tense) is mentioned in the epistle. And so, water
baptism is mentioned, even in the epistles.